The Buffer Tube Castle Nut is only used on most pistol and carbine buffers. They are used to hold in place the end plate. Here is a picture of one:
You can purchase a Buffer Tube Castle Nut here, or here, or here.
The Buffer Tube Castle Nut is only used on most pistol and carbine buffers. They are used to hold in place the end plate. Here is a picture of one:
You can purchase a Buffer Tube Castle Nut here, or here, or here.